Observer.java

package org.trimou.tests.cdi.context;

import java.util.ArrayList;
import java.util.List;

import javax.enterprise.context.ApplicationScoped;
import javax.enterprise.event.Observes;

@ApplicationScoped
public class Observer {

    private List<Long> foos = new ArrayList<>();

    public void observeFoo(@Observes Foo foo) {
        foos.add(foo.getCreatedAt());
    }

    public List<Long> getFoos() {
        return foos;
    }

}